Re: Benefits of 129/130 gr bullets w 6.5x284?
Unless you are limiting your shooting to a load for mid range hunting, I would opt for the 140 Berger. My Cooper 1:8 twist generates excellent ballistic performace, sub .5MOA accuracy, and single digit ES with with Retumbo. Velocity runs 2975FPS in a 26" barrel. No pressure signs, and easy on brass.
"Let us speak courteously, deal fairly, and keep ourselves armed and ready"-T. Roosevelt